There are hints more damaging Trump tapes exist — and someone is already willing to pay millions for them

The rumor mill hit a fever pitch over the weekend as the Republican presidential nominee faced an onslaught of criticism over a leaked recording of his boasting about being able to "grab" women "by the p---y" because "when you're a star they let you do it."

And now, a top Clinton backer has reportedly said he's willing to pay millions to obtain more damaging footage.

Late on Saturday, a producer from the first two seasons of NBC's "The Apprentice," the show Trump hosted, fueling his celebrity, tweeted that he could "assure you, when it comes to the #trumptapes there are far worse. #justthebegininng."

Fox News host Geraldo Rivera also chimed in on Sunday, saying he uncovered more "embarrassing" remarks Trump made with him during past interviews.

"I have interviewed Donald Trump many times and been with him many times and I have tapes," Rivera said on Fox News. "My brother and I have been starting to go through the tapes now and there are statements that, in the context of the current climate, would be embarrassing."

He did not say whether he would release the tapes.

"He's never used the P-word in front of me — I'll say that," Rivera said later. "But I never saw him come onto any of the beautiful women on the program."

A source connected to "The Apprentice" who has expressed support for Trump told Business Insider on Saturday that the person was "surprised" similar stories to Friday's leak in The Washington Post hadn't happened.

The source said the Manhattan billionaire "talked like that all the time."

Chris Nee, a television producer who did not work on "The Apprentice," tweeted Sunday that the penalty fee for leaking such audio would be $5 million because of nondisclosure agreements. He tagged Mark Cuban, the billionaire businessman and prominent backer of Democratic nominee Hillary Clinton, in the tweet to see whether he'd be interested in paying the fee.

Cuban did not immediately respond to a request for comment from Business Insider on Sunday afternoon.

Just hours before Sunday night's second presidential debate, however, the head of a pro-Clinton super PAC told BuzzFeed he would be willing to pay such a penalty fee to leak the tapes.

"If a $5 million 'leak fee' is what stands between truth and total Trump implosion, sign me up," David Brock, the founder of American Bridge and a leading Clinton ally, told BuzzFeed in an email.

Another source told BuzzFeed that Mark Burnett, the producer of "The Apprentice," was backing Trump and had threatened employees with legal action should they decide to leak additional material.

Friday's shocking leaked recording of Trump, which was picked up by a hot mic and published by The Post on Friday, came from an interaction between Trump and television personality Billy Bush in 2005. In addition to his comments about grabbing women "by the p---y," Trump made a litany of other sexually suggestive remarks.

Almost immediately, Trump came under fire from those on both sides of the aisle, with many top Republicans strongly condemning the comments and some rescinding their endorsement of the Manhattan billionaire altogether.

Shortly before Sunday night's debate, Trump held a news conference with three women who accused former President Bill Clinton of sexual misconduct and one woman who was a victim in a rape case in which the former secretary of state defended the accused. It was viewed as an attempt to move the conversation away from the latest tapes and back onto the Democratic nominee.